Immunohistochemical analysis of adhesive papillae of Clavelina lepadiformis (Müller, 1776) and Clavelina phlegraea (Salfi, 1929) (Tunicata, Ascidiacea).

  title={Immunohistochemical analysis of adhesive papillae of Clavelina lepadiformis (M{\"u}ller, 1776) and Clavelina phlegraea (Salfi, 1929) (Tunicata, Ascidiacea).},
  author={Roberta Pennati and Silvia Groppelli and Fiorenza de Bernardi and Francesco Mastrototaro and Giuliana Zega},
  journal={European journal of histochemistry : EJH},
  volume={53 1},
Almost all ascidian larvae bear three mucus secreting and sensory organs, the adhesive papillae, at the anterior end of the trunk, which play an important role during the settlement phase. The morphology and the cellular composition of these organs varies greatly in the different species. The larvae of the Clavelina genus bear simple bulbous papillae, which are considered to have only a secretory function. We analysed the adhesive papillae of two species belonging to this genus, C. lepadiformis… Expand
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The anterior-most ectoderm of ascidian larvae contains the adhesive papillae, or palps, which play an important role in triggering the metamorphosis of swimming tadpoles. In Ciona intestinalis, theExpand
Islet is a key determinant of ascidian palp morphogenesis
It is shown that Islet expression can rescue the palp-deficient phenotype that results from inhibition of FGF signaling, and it is concluded that Is let is a key regulatory factor governing morphogenesis of the palps. Expand
Immunohistochemical study of the nervous system of the tunicate Thalia democratica (Forsskal, 1775).
Improved knowledge of the anatomy of T. democratica is improved and the presence of a complex serotonergic system is demonstrated, which may be linked to the planktonic life of these animals. Expand
Differentiation of papillae and rostral sensory neurons in the larva of the ascidian Botryllus schlosseri (Tunicata)
During the metamorphosis of tunicate ascidians, the swimming larva uses its three anterior papillae to detect the substrate for settlement, reabsorbs its chordate‐like tail, and becomes a sessileExpand
Histochemistry through the years, browsing a long-established journal: novelties in traditional subjects
  • C. Pellicciari
  • Biology, Medicine
  • European journal of histochemistry : EJH
  • 2010
This survey confirmed that histochemistry has provided and still offers unique opportunities for studying the structure, chemical composition and function of cells and tissues in a wide variety of living organisms, especially when the topological distribution of specific molecular components has diagnostic or predictive significance, as it occurs in human and veterinary biology and pathology. Expand


Morphology of the adhesive papillae of some ascidian larvae
Larval adhesive organs and metamorphosis in ascidians
The cup-shaped adhesive papillae of Distaplia occidentalis evert at the onset of metamorphosis and each transforms into a hyperboloidal configuration and the myoepithelial cells are the driving force in papillary eversion. Expand
Urochordata : Ascidiacea
  • Microscopic Anatomy of Invertebrates , WileyLiss Inc
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Urochordata: Ascidiacea. In Microscopic Anatomy of Invertebrates, Wiley-Liss Inc 1997;15:221-347
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Species of Clavelina in the Mediterranean Sea
Fenomeni d’insediamento in Clavelina lepadiformis (Müller) (Tunicata)
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  • 1977
Dopamine and serotonin modulate the onset of metamorphosis in the ascidian Phallusia mammillata.
A mechanism by which these neurotransmitters may modulate the timing of metamorphosis in larvae is proposed, which is possible to suppose that dopamine signaling delayed meetamorphosis while serotonin signaling triggers it. Expand
Spatial and seasonal distribution of ascidians in a semi-enclosed basin of the Mediterranean Sea
The most abundant species in the Mar Piccolo of Taranto were Clavelina phlegraea, Ciona intestinalis and Styela plicata all of which are able to tolerate the variations in environmental conditions, low rate of water renewal and continuous silting of this semi-enclosed Mediterranean basin. Expand
Immunohistochemical analysis of the adhesive papillae of Botrylloides leachi (Chordata, Tunicata, Ascidiacea): Implications for their sensory function
By immunohistochemical localization of serotonin and β‐tubulin, it is demonstrated that the adhesive papillae of Botrylloides leachi contain two distinct types of neurons with different localization and possibly a different function. Expand
Observations on the settlement of phallusia mammillata larvae: Effects of different lithological substrata
Abstract In the sessile marine tunicates, the selection of a suitable substratum by the larvae is an important and critical factor determining the distribution of species. The present paperExpand